Re: sql basic question

Maybe something like:

test=*# select * from foo;
label | id | distance | side
-------+--------+------------------+------
15 | 119006 | 0.10975569030617 | 1
14 | 119006 | 0.11844830745091 | 0
16 | 119006 | 0.17624040731777 | 0
20 | 119006 | 0.39363711745035 | 0
19 | 119006 | 0.41205442839764 | 1
24 | 119006 | 0.35455674575682 | 1
12 | 23434 | 0.88764543364566 | 0
31 | 23434 | 0.53456343463466 | 0
33 | 23434 | 0.23235478697988 | 1
1 | 23434 | 0.59758734628752 | 0
14 | 129007 | 0.63454675634756 | 0
13 | 129007 | 0.22345364656788 | 1
11 | 129007 | 0.86787897897689 | 1
12 | 129007 | 0.34678678978089 | 1
19 | 129007 | 0.97897897897654 | 0
(15 rows)

test=*# select * from (select distinct on (id, side) label, id, distance, side,
'm'::text as min_max from foo order by id, side, distance) a union all (select
distinct on (id, side) label, id, distance, side, 'M' as min_max from foo order
by id, side, distance desc);
label | id | distance | side | min_max
-------+--------+------------------+------+---------
31 | 23434 | 0.53456343463466 | 0 | m
33 | 23434 | 0.23235478697988 | 1 | m
14 | 119006 | 0.11844830745091 | 0 | m
15 | 119006 | 0.10975569030617 | 1 | m
14 | 129007 | 0.63454675634756 | 0 | m
13 | 129007 | 0.22345364656788 | 1 | m
12 | 23434 | 0.88764543364566 | 0 | M
33 | 23434 | 0.23235478697988 | 1 | M
20 | 119006 | 0.39363711745035 | 0 | M
19 | 119006 | 0.41205442839764 | 1 | M
19 | 129007 | 0.97897897897654 | 0 | M
11 | 129007 | 0.86787897897689 | 1 | M
(12 rows)

Better?

Antonio Parrotta <antonioparrotta(at)gmail(dot)com> hat am 28. Dezember 2012 um 15:52
geschrieben:
> Hello Andreas,
>
> apologize for the misunderstanding. Hope to clarify now. For each ID I
> want a min and max for each SIDE. I have about 160K records like this:
>
> label | id | distance | side
> -------+--------+-------------------+------
> 15 | 119006 | 0.10975569030617 | 1 *m
> 14 | 119006 | 0.11844830745091 | 0 *m
> 16 | 119006 | 0.17624040731777 | 0
> 20 | 119006 | 0.39363711745035 | 0 *M
> 19 | 119006 | 0.41205442839764 | 1 *M
> 24 | 119006 | 0.35455674575682 | 1
> 12 | 23434 | 0.88764543364566 | 0 *M
> 31 | 23434 | 0.53456343463466 | 0 *m
> 33 | 23434 | 0.23235478697988 | 1 *m/M
> 01 | 23434 | 0.59758734628752 | 0
> 14 | 129007 | 0.63454675634756 | 0 *m
> 13 | 129007 | 0.22345364656788 | 1 *m
> 11 | 129007 | 0.86787897897689 | 1 *M
> 12 | 129007 | 0.34678678978089 | 1
> 19 | 129007 | 0.97897897897654 | 0 *M
> (*M maximum for that ID and SIDE, *m minimum for that ID and SIDE)
>
> result should be:
> 14 | 119006 | 0.11844830745091 | 0 *m
> 20 | 119006 | 0.39363711745035 | 0 *M
> 15 | 119006 | 0.10975569030617 | 1 *m
> 19 | 119006 | 0.41205442839764 | 1 *M
> 31 | 23434 | 0.53456343463466 | 0 *m
> 12 | 23434 | 0.88764543364566 | 0 *M
> 33 | 23434 | 0.23235478697988 | 1 *m/M
> 14 | 129007 | 0.63454675634756 | 0 *m
> 19 | 129007 | 0.97897897897654 | 0 *M
> 13 | 129007 | 0.22345364656788 | 1 *m
> 11 | 129007 | 0.86787897897689 | 1 *M
>
> thanks
>
>
> - Antonio
>
>
> On 28 December 2012 15:19, Andreas Kretschmer <andreas(at)a-kretschmer(dot)de>wrote:
>
> > Hi,
> >
> > your question was: "What I want to achieve is a result table with min and
> > max
> > distance for each side".
> >
> > Okay, with SIDE in 0,1,-1,2,-2,3,-3 there are exactly 14 possible values
> > for
> > each SIDE and Min/Max.
> >
> >
> > If this is wrong, describe your problem better.
> >
> >
> >
> >
> > Antonio Parrotta <antonioparrotta(at)gmail(dot)com> hat am 28. Dezember 2012 um
> > 15:12
> > geschrieben:
> > > Hi Andreas, Anton,
> > >
> > > I did some test and both queries didn't worked. Maybe I was not clear
> > with
> > > the example provided.
> > > My table contains more than 160K records with SIDE 0, 1, -1, 2, -2, 3 and
> > > -3.
> > > Example provided is a very small subset.
> > >
> > > *Andrea's *query is failing because it is getting only distinct SIDEs.
> > The
> > > query returns just 14 rows.
> > >
> > > *Anton's *one because it is joining on distance so merges records
> > without a
> > > relation (I have many rows with a distance of 0 for example). I need to
> > > have a join on IDs instead
> > >
> > > Thanks
> > >
> > > - Antonio
> > >
> > >
> > > On 28 December 2012 13:00, Andreas Kretschmer <andreas(at)a-kretschmer(dot)de
> > >wrote:
> > >
> > > > >
> > > > > so the result should be:
> > > > > LABEL ID Distance SIDE
> > > > > "15"; 119006; 0.10975569030617; 1
> > > > > "19"; 64056; 0.41205442839764; 1
> > > > > "14"; 64054; 0.118448307450912; 0
> > > > > "24"; 119007; 0.59758734628752; 0
> > > > >
> > > > >
> > > >
> > > >
> > > >
> > > > test=*# select * from foo;
> > > > label | id | distance | side
> > > > -------+--------+-------------------+------
> > > > 15 | 119006 | 0.10975569030617 | 1
> > > > 14 | 64054 | 0.118448307450912 | 0
> > > > 16 | 64055 | 0.176240407317772 | 0
> > > > 20 | 64057 | 0.39363711745035 | 0
> > > > 19 | 64056 | 0.41205442839764 | 1
> > > > 24 | 119007 | 0.59758734628752 | 0
> > > > (6 rows)
> > > >
> > > > test=*# select * from (select distinct on (side) label, id, distance,
> > side
> > > > from
> > > > foo order by side, distance) a union all (select distinct on (side)
> > label,
> > > > id,
> > > > distance, side from foo order by side, distance desc) order by side
> > desc,
> > > > label;
> > > > label | id | distance | side
> > > > -------+--------+-------------------+------
> > > > 15 | 119006 | 0.10975569030617 | 1
> > > > 19 | 64056 | 0.41205442839764 | 1
> > > > 14 | 64054 | 0.118448307450912 | 0
> > > > 24 | 119007 | 0.59758734628752 | 0
> > > > (4 rows)
> > > >
> > > >
> > > > HTH, Andreas
> > > >
> > > Hi Andreas, Anton,
> > >
> > > I did some test and both queries didn't worked. Maybe I was not clear
> > with the
> > > example provided.
> > > My table contains more than 160K records with SIDE 0, 1, -1, 2, -2, 3
> > and -3.
> > > Example provided is a very small subset.
> > >
> > > Andrea's query is failing because it is getting only distinct SIDEs. The
> > query
> > > returns just 14 rows.
> > >
> > > Anton's one because it is joining on distance so merges records without a
> > > relation (I have many rows with a distance of 0 for example). I need to
> > have a
> > > join on IDs instead
> > >
> > > Thanks
> > >
> > > - Antonio
> > >
> > >
> > > On 28 December 2012 13:00, Andreas Kretschmer <andreas(at)a-kretschmer(dot)de>
> > wrote:
> > > > >
> > > > > so the result should be:
> > > > > LABEL ID Distance SIDE
> > > > > "15"; 119006; 0.10975569030617; 1
> > > > > "19"; 64056; 0.41205442839764; 1
> > > > > "14"; 64054; 0.118448307450912; 0
> > > > > "24"; 119007; 0.59758734628752; 0
> > > > >
> > > > >
> > > >
> > > >
> > > >
> > > > test=*# select * from foo;
> > > > label | id | distance | side
> > > > -------+--------+-------------------+------
> > > > 15 | 119006 | 0.10975569030617 | 1
> > > > 14 | 64054 | 0.118448307450912 | 0
> > > > 16 | 64055 | 0.176240407317772 | 0
> > > > 20 | 64057 | 0.39363711745035 | 0
> > > > 19 | 64056 | 0.41205442839764 | 1
> > > > 24 | 119007 | 0.59758734628752 | 0
> > > > (6 rows)
> > > >
> > > > test=*# select * from (select distinct on (side) label, id,
> > distance, side
> > > > from
> > > > foo order by side, distance) a union all (select distinct on (side)
> > label,
> > > > id,
> > > > distance, side from foo order by side, distance desc) order by side
> > desc,
> > > > label;
> > > > label | id | distance | side
> > > > -------+--------+-------------------+------
> > > > 15 | 119006 | 0.10975569030617 | 1
> > > > 19 | 64056 | 0.41205442839764 | 1
> > > > 14 | 64054 | 0.118448307450912 | 0
> > > > 24 | 119007 | 0.59758734628752 | 0
> > > > (4 rows)
> > > >
> > > >
> > > > HTH, Andreas
> >
> Hello Andreas,
>
> apologize for the misunderstanding. Hope to clarify now. For each ID I want a
> min and max for each SIDE. I have about 160K records like this:
>
> label | id | distance | side
> -------+--------+-------------------+------
> 15 | 119006 | 0.10975569030617 | 1 *m
> 14 | 119006 | 0.11844830745091 | 0 *m
> 16 | 119006 | 0.17624040731777 | 0
> 20 | 119006 | 0.39363711745035 | 0 *M
> 19 | 119006 | 0.41205442839764 | 1 *M
> 24 | 119006 | 0.35455674575682 | 1
> 12 | 23434 | 0.88764543364566 | 0 *M
> 31 | 23434 | 0.53456343463466 | 0 *m
> 33 | 23434 | 0.23235478697988 | 1 *m/M
> 01 | 23434 | 0.59758734628752 | 0
> 14 | 129007 | 0.63454675634756 | 0 *m
> 13 | 129007 | 0.22345364656788 | 1 *m
> 11 | 129007 | 0.86787897897689 | 1 *M
> 12 | 129007 | 0.34678678978089 | 1
> 19 | 129007 | 0.97897897897654 | 0 *M
> (*M maximum for that ID and SIDE, *m minimum for that ID and SIDE)
>
> result should be:
> 14 | 119006 | 0.11844830745091 | 0 *m
> 20 | 119006 | 0.39363711745035 | 0 *M
> 15 | 119006 | 0.10975569030617 | 1 *m
> 19 | 119006 | 0.41205442839764 | 1 *M
> 31 | 23434 | 0.53456343463466 | 0 *m
> 12 | 23434 | 0.88764543364566 | 0 *M
> 33 | 23434 | 0.23235478697988 | 1 *m/M
> 14 | 129007 | 0.63454675634756 | 0 *m
> 19 | 129007 | 0.97897897897654 | 0 *M
> 13 | 129007 | 0.22345364656788 | 1 *m
> 11 | 129007 | 0.86787897897689 | 1 *M
>
> thanks
>
>
> - Antonio
>
>
> On 28 December 2012 15:19, Andreas Kretschmer <andreas(at)a-kretschmer(dot)de> wrote:
> > Hi,
> >
> > your question was: "What I want to achieve is a result table with min and
> > max
> > distance for each side".
> >
> > Okay, with SIDE in 0,1,-1,2,-2,3,-3 there are exactly 14 possible values
> > for
> > each SIDE and Min/Max.
> >
> >
> > If this is wrong, describe your problem better.
> >
> >
> >
> >
> > Antonio Parrotta < antonioparrotta(at)gmail(dot)com> hat am 28. Dezember 2012 um
> > 15:12
> > geschrieben:
> > > Hi Andreas, Anton,
> > >
> > > I did some test and both queries didn't worked. Maybe I was not clear
> > > with
> > > the example provided.
> > > My table contains more than 160K records with SIDE 0, 1, -1, 2, -2, 3
> > > and
> > > -3.
> > > Example provided is a very small subset.
> > >
> > > *Andrea's *query is failing because it is getting only distinct SIDEs.
> > > The
> > > query returns just 14 rows.
> > >
> > > *Anton's *one because it is joining on distance so merges records
> > > without a
> > > relation (I have many rows with a distance of 0 for example). I need to
> > > have a join on IDs instead
> > >
> > > Thanks
> > >
> > > - Antonio
> > >
> > >
> > > On 28 December 2012 13:00, Andreas Kretschmer <
> > > andreas(at)a-kretschmer(dot)de>wrote:
> > >
> > > > >
> > > > > so the result should be:
> > > > > LABEL ID Distance SIDE
> > > > > "15"; 119006; 0.10975569030617; 1
> > > > > "19"; 64056; 0.41205442839764; 1
> > > > > "14"; 64054; 0.118448307450912; 0
> > > > > "24"; 119007; 0.59758734628752; 0
> > > > >
> > > > >
> > > >
> > > >
> > > >
> > > > test=*# select * from foo;
> > > > label | id | distance | side
> > > > -------+--------+-------------------+------
> > > > 15 | 119006 | 0.10975569030617 | 1
> > > > 14 | 64054 | 0.118448307450912 | 0
> > > > 16 | 64055 | 0.176240407317772 | 0
> > > > 20 | 64057 | 0.39363711745035 | 0
> > > > 19 | 64056 | 0.41205442839764 | 1
> > > > 24 | 119007 | 0.59758734628752 | 0
> > > > (6 rows)
> > > >
> > > > test=*# select * from (select distinct on (side) label, id, distance,
> > > > side
> > > > from
> > > > foo order by side, distance) a union all (select distinct on (side)
> > > > label,
> > > > id,
> > > > distance, side from foo order by side, distance desc) order by side
> > > > desc,
> > > > label;
> > > > label | id | distance | side
> > > > -------+--------+-------------------+------
> > > > 15 | 119006 | 0.10975569030617 | 1
> > > > 19 | 64056 | 0.41205442839764 | 1
> > > > 14 | 64054 | 0.118448307450912 | 0
> > > > 24 | 119007 | 0.59758734628752 | 0
> > > > (4 rows)
> > > >
> > > >
> > > > HTH, Andreas
> > > >
> > > Hi Andreas, Anton,
> > >
> > > I did some test and both queries didn't worked. Maybe I was not clear
> > > with the
> > > example provided.
> > > My table contains more than 160K records with SIDE 0, 1, -1, 2, -2, 3
> > > and -3.
> > > Example provided is a very small subset.
> > >
> > > Andrea's query is failing because it is getting only distinct SIDEs. The
> > > query
> > > returns just 14 rows.
> > >
> > > Anton's one because it is joining on distance so merges records without
> > > a
> > > relation (I have many rows with a distance of 0 for example). I need to
> > > have a
> > > join on IDs instead
> > >
> > > Thanks
> > >
> > > - Antonio
> > >
> > >
> > > On 28 December 2012 13:00, Andreas Kretschmer < andreas(at)a-kretschmer(dot)de>
> > > wrote:
> > > > >
> > > > > so the result should be:
> > > > > LABEL ID Distance SIDE
> > > > > "15"; 119006; 0.10975569030617; 1
> > > > > "19"; 64056; 0.41205442839764; 1
> > > > > "14"; 64054; 0.118448307450912; 0
> > > > > "24"; 119007; 0.59758734628752; 0
> > > > >
> > > > >
> > > >
> > > >
> > > >
> > > > test=*# select * from foo;
> > > > label | id | distance | side
> > > > -------+--------+-------------------+------
> > > > 15 | 119006 | 0.10975569030617 | 1
> > > > 14 | 64054 | 0.118448307450912 | 0
> > > > 16 | 64055 | 0.176240407317772 | 0
> > > > 20 | 64057 | 0.39363711745035 | 0
> > > > 19 | 64056 | 0.41205442839764 | 1
> > > > 24 | 119007 | 0.59758734628752 | 0
> > > > (6 rows)
> > > >
> > > > test=*# select * from (select distinct on (side) label, id,
> > > > distance, side
> > > > from
> > > > foo order by side, distance) a union all (select distinct on (side)
> > > > label,
> > > > id,
> > > > distance, side from foo order by side, distance desc) order by side
> > > > desc,
> > > > label;
> > > > label | id | distance | side
> > > > -------+--------+-------------------+------
> > > > 15 | 119006 | 0.10975569030617 | 1
> > > > 19 | 64056 | 0.41205442839764 | 1
> > > > 14 | 64054 | 0.118448307450912 | 0
> > > > 24 | 119007 | 0.59758734628752 | 0
> > > > (4 rows)
> > > >
> > > >
> > > > HTH, Andreas